He had a phone in his hand as he walked by Jane. Partridge is an acolyte. We don't know how long it was between when Lisbon was first attacked and when Jane got to talk to RJ. That may not have been him drawing the smiley face on Lisbon (because that doesn't seem very RJ like, does it. It wouldn't be the first thing you see when you walk in... that being said she's not dead so it may be creep factor).
CBI Ron is always there. He can sneak around and see things without drawing suspicion.

Bruno said in an interview there is a clue buried in the last sequence of the first episode of the new season 6. I think the clue is this;

In the last scene Patrick asks Ron has he seen Lisbon, Ron says no then he walks away and Patricks phone instantly rings..

I think Ron was in the house, he stole Lisbons phone and went back to police station waiting for Patrick to arrive back from the desert so he could call him and give himself an alibi at the same time.

In the scene where Red John is wiping the blade he has one hand holding the blade the the other hand is wiping it, how can he be talking on the phone at the same time to Patrick? This means the director is making you think Red John is still at the scene when Patrick is on the phone to him when actually he is back at the CBI office.

If you look at the very last sequence there is alot of attention made on Lisbons mobile phone... When she is in the office there is a close-up of her phone showing Patrick calling.. in the creepy house her phone vibrates... and then in the last scene the first thing you see is Ron walking the hallway with his mobile out..

Why would the director put so much emphasis on their mobile phones?

As bruno says that the last sequence holds a good clue, this guy is seen holding his phone right before jane gets a call . may be this is the clue...

Okay, I'm not really sure if this means anything, but in the last scene of "The desert rose", right after we see Lisbon getting pulled back, we see Jane walking through one of the corridors of the CBI-building. As he walks through the corridor, he suddenly bumps into Ron, and asks him if he has seen Lisbon. Ron says "Nope", and moves on, and the very next second, Jane receives a phone call from Lisbon, he presumes, which turns out to be RJ. Now, if you go back to when he bumps into Ron, you'll see that Ron is on his phone. The phone is lighted up, and as Jane's phone rings, Ron is out of the picture. 
I know Heller says that RJ is on PJ's list, but he never said that it was the list that has been laid out before us. 
Patrick must have known that RJ would go for the list, therefore the toothpick in the door, and from there on, he could just alter things to look like RJ has the upper hand, while Jane, in the meantime, controls the real list. 

I do suspect Partridge to be in somehow as well, one does not simply say "Tyger! Tyger!" as your last words, unless you've been told to do so, or, if in fact, you are Red John, or working with him. 

The clip where we see RJ paint Lisbon's face could be taken from long before that phone call found place. As she walks through the house where Partridge is, she receives a phone call from Jane. We don't know where he made this phone call from, but to me, it seems like he is driving, not parking and preparing to enter the CBI building. It could have been 30 minutes or more until he arrived at the CBI building, which could give Ron the time to set up Lisbon's face, leave the building with her phone and come back to the CBI building, and as he sees PJ, he decides to make the phone call. The phone call does not necessarily need to come from the crime scene, as we don't know how long it took for Jane to get to the CBI, and as we don't know where he was as the call was made. 

I don't know if this makes sense at all, but my money is either on Ron or Partridge, even though it would seem that Partridge is dead (Which we will probably know next episode)

I've watched season 1,5, most of 2 and 4 and

I have no idea who this guy is ?

Who is he ? I've never seen him speak to the team or anyone ?

So! i have literally been obsessing over who red john is for the last 2 weeks, for some reason the 7 suspects make no sense to me at all even after reading tons and tons of very logical and convincing theories. One thing i have hung on to is that bruno heller descriped red john as a wheres waldo character...i interpret this as someone who is always around but never noticed straight away, Then my attention was brought to CBI RON!!! so i searched for all the episodes he was credited in... i watched them hes a little creepy gives funny looks to main suspects but what has got me is that i searched the mentalist best episodes rating by viewers and this took me to season 1 episode 16- Bloodshot (patrick jane goes blind after a bomb explosion - van pelt is dating the enemy again! and there is scene near the end of the episode where the enemy/bomber is chasing van pelt and jane through the parking lot and a car is seen to be pulling out and who is in it CBI RON and they look at each other and he drives away - he isnt credited at all in this episode on anything imdb, wiki but he is in that car clear as day. he is first credited in season 2 and half way through it. 
now i know we are supposed to trust he list and rosaline harkers description but it all contradictory the list doesn't fit the her description  there is so much evidence that doesnt fit and maybe that is on purpose not all evidence is relevant.  only one thing for me fits CBI RON - WALDO!!! 

Bruno Heller insists that one of the names of the 7 suspects is Red John. One of the names. But he did not say that it is one of the people suspected. My theory is that Ray Haffner and Ron switched identies some short time after meeting at visualize.